Mal is right, don't sweat it as long as the cylinder turns freely. Out=more case capacity, in=less. This will *usually* equate to more capacity=lower pressures, less=higher.
There are plenty of situations where OAL it critical, i.e. making sure a round will feed in a magazine fed gun and some rifle loads where pushing the bullet onto the lands will cause a dangerous pressure rise are a few that come to mind.
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